Surfboard fin



FIG. 1 is a right perspective view of a surfboard fin;

FIG. 2 is a left perspective view thereof;

FIG. 3 is a right top perspective view thereof;

FIG. 4 is a left bottom perspective view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a rear view thereof;

FIG. 8 is a front view thereof;

FIG. 9 is a top view thereof; and,

FIG. 10 is a bottom view thereof. 

The ornamental design for a surfboard fin, as shown and described. 